Question

I've heard that after age 40 or 50, an engineer becomes
prettymuch obsolete due to rapidly changing technology.
Companieswant fresh, young engineers who are right out of school
becausethey know modern technology much better. The only way to
stayemployed is to go back to school, start your own bussiness,
becomea proffessor, etc... If there are any older engineers
thathave gone through this or have seen it happen, could you
pleaserespond to me. How true is this and what kind of options
doyou truly have when this occurs?